The role of left ventricle global longitudinal srain in prediction of chemotherapy —  induced cardiotoxicity in breast cancer patients treated by low and moderate cumulative doses of anthracyclines

Objective. To evaluate the alterations of Global longitudinsl strain (GLS) and it’s value for prediction of cardiotoxicity of low to moderate cumulative doses of anthracyclines. Methods. Forty-nine women 50 ± 10 years old with breast cancer, treated with anthracyclines (cumulative dose of 251 ± 60 mg/m2) were enrolled in the study. Echocardiography with GLS measurement was performed at baseline, at the end of anthracycline treatment, then every 3 months during 1 year. Cardiotoxicity was defined as a decline in left ventricular ejection fraction (LVEF) of at least 10 % to ≤ 53 %. Results. There was a significant increase in mean LVESV and LVEDV and decrease of GLS (р < 0,05) but not LVEF at 3 month post anthracycline treatment. Cardiotoxicity was detected in 8 patients (16 %) with moderate baseline risk. Absolute ≥ 4 % reduction of GLS during follow-up, GLS andpercent of it’s reduction from baseline to 3 month post-anthracycline were predictive of cardiotoxicity (AUC = 0,822 and 0,870, respectively). The reduction in GLS of >12,5 % from baseline at 3 month post anthracyclines was predictive of cardiotoxicity with sensitivity of 80 % and specificity of 95 %. Conclusions. GLS and its reduction from baseline has shown predictive value for development of cardiotoxicity in patients with moderate risk treated with low-to moderate cumulative doses of antracyclines. Additional echocardiography with GLS assessment at 3–6 month after completion of anthracycline treatment may be recommended irrespective of cardiotoxicity risk.